<table border="5" >
<tr >
    <td colspan="2"><?php  $this->load->view('header'); ?>  </td>
 </tr>
<tr>
    <td colspan="2"><?php  $this->load->view('navigation');  ?></td>
</tr>
 <tr>
    <td width="40%"><?php $this->load->view('links'); ?></td>
    <td  width="60%"><?php $this->load->view($main_content);?></td>
 </tr>
 <tr>
    <td colspan="2"><?php $this->load->view('footer'); ?></td>
 </tr>
 </table>